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-rw-r--r--src/nix/copy.cc12
1 files changed, 8 insertions, 4 deletions
diff --git a/src/nix/copy.cc b/src/nix/copy.cc
index 976b0d3e0b81..b2165cb8f85c 100644
--- a/src/nix/copy.cc
+++ b/src/nix/copy.cc
@@ -38,15 +38,19 @@ struct CmdCopy : StorePathsCommand
         };
     }
 
-    void run(ref<Store> store, Paths storePaths) override
+    ref<Store> createStore() override
+    {
+        return srcUri.empty() ? StoreCommand::createStore() : openStore(srcUri);
+    }
+
+    void run(ref<Store> srcStore, Paths storePaths) override
     {
         if (srcUri.empty() && dstUri.empty())
             throw UsageError("you must pass ‘--from’ and/or ‘--to’");
 
-        ref<Store> srcStore = srcUri.empty() ? store : openStore(srcUri);
-        ref<Store> dstStore = dstUri.empty() ? store : openStore(dstUri);
+        ref<Store> dstStore = dstUri.empty() ? openStore() : openStore(dstUri);
 
-        copyPaths(srcStore, dstStore, storePaths);
+        copyPaths(srcStore, dstStore, PathSet(storePaths.begin(), storePaths.end()));
     }
 };